feat: metrics: Expose libp2p traffic metrics using prometheus

[Kubuxu]

Related Issues

Resolves filecoin-project/go-f3#575

Proposed Changes

Expose libp2p trafic metrics over prometheus

Additional Info

Checklist

Before you mark the PR ready for review, please make sure that:

• Commits have a clear commit message.
• PR title conforms with contribution conventions
• Update CHANGELOG.md or signal that this change does not need it per contribution conventions
• New features have usage guidelines and / or documentation updates in
  • Lotus Documentation
  • Discussion Tutorials
• Tests exist for new functionality or change in behavior
• CI is green

[Kubuxu]

Metrics are exposed as follows:

# HELP lotus_libp2p_traffic_bytes_total Number of bytes transferred over libp2p streams
# TYPE lotus_libp2p_traffic_bytes_total counter
lotus_libp2p_traffic_bytes_total{direction="inbound",proto="/chain/ipfs/bitswap/1.2.0"} 486267
lotus_libp2p_traffic_bytes_total{direction="inbound",proto="/fil/chain/xchg/0.0.1"} 6.76525828e+08
lotus_libp2p_traffic_bytes_total{direction="inbound",proto="/fil/hello/1.0.0"} 2.590733e+06
lotus_libp2p_traffic_bytes_total{direction="inbound",proto="/fil/kad/testnetnet/kad/1.0.0"} 1.1884009e+07
lotus_libp2p_traffic_bytes_total{direction="inbound",proto="/ipfs/id/1.0.0"} 5.625354e+06
lotus_libp2p_traffic_bytes_total{direction="inbound",proto="/ipfs/id/push/1.0.0"} 1.173708e+06
lotus_libp2p_traffic_bytes_total{direction="inbound",proto="/ipfs/ping/1.0.0"} 1344
lotus_libp2p_traffic_bytes_total{direction="inbound",proto="/libp2p/autonat/1.0.0"} 2428
lotus_libp2p_traffic_bytes_total{direction="inbound",proto="/meshsub/1.1.0"} 6.58878e+06
lotus_libp2p_traffic_bytes_total{direction="inbound",proto="unknown"} 1.126299e+06
lotus_libp2p_traffic_bytes_total{direction="outbound",proto="/chain/ipfs/bitswap/1.2.0"} 295014
lotus_libp2p_traffic_bytes_total{direction="outbound",proto="/fil/chain/xchg/0.0.1"} 797754
lotus_libp2p_traffic_bytes_total{direction="outbound",proto="/fil/hello/1.0.0"} 987845
lotus_libp2p_traffic_bytes_total{direction="outbound",proto="/fil/kad/testnetnet/kad/1.0.0"} 1.2802145e+07
lotus_libp2p_traffic_bytes_total{direction="outbound",proto="/ipfs/id/1.0.0"} 9.693344e+06
lotus_libp2p_traffic_bytes_total{direction="outbound",proto="/ipfs/id/push/1.0.0"} 7.695159e+06
lotus_libp2p_traffic_bytes_total{direction="outbound",proto="/ipfs/ping/1.0.0"} 1344
lotus_libp2p_traffic_bytes_total{direction="outbound",proto="/libp2p/autonat/1.0.0"} 13800
lotus_libp2p_traffic_bytes_total{direction="outbound",proto="/meshsub/1.1.0"} 2.561056e+06
lotus_libp2p_traffic_bytes_total{direction="outbound",proto="unknown"} 1.109935e+06

[Stebalien]

I'm not seeing any CPU impact from this change, but it's responsible for 6% of object allocations on an otherwise idle node. I'm going to see if we can do this lazily.

profile.zip

(I'd upload it as an SVG, but GitHub doesn't react very well).

[Stebalien]

Testing #12402 as an alternative.

[Kubuxu]

Superseded by #12402